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Thesaurus

U-238
BT	isotopes
	.radioactive isotopes
	..U-238
BT	metals
	.actinides
	..uranium
	...U-238
RT	U-238/Pb-204
	U-238/Th-230
	U-238/Th-232
	U-238/U-234
	U-238/U-235
SN	This term has multiple hierarchies.

U-238/Pb-204
BT	isotopes
	.radioactive isotopes
	..U-238/Pb-204
BT	metals
	.lead
	..U-238/Pb-204
BT	metals
	.actinides
	..uranium
	...U-238/Pb-204
RT	HIMU
	Pb-204
	U-238
SN	For isotopic ratio used in age determination, use U/Pb. This term has multiple hierarchies.

U-238/Pb-206
BT	isotopes
	.radioactive isotopes
	..U-238/Pb-206
BT	isotopes
	.stable isotopes
	..U-238/Pb-206
BT	metals
	.lead
	..U-238/Pb-206
BT	metals
	.actinides
	..uranium
	...U-238/Pb-206
RT	isotope ratios
SN	As of 1989, for isotopic ratio used in age determination, use U/Pb. This term has multiple hierarchies.

U-238/Th-230
BT	isotopes
	.radioactive isotopes
	..U-238/Th-230
BT	metals
	.actinides
	..thorium
	...U-238/Th-230
BT	metals
	.actinides
	..uranium
	...U-238/Th-230
UF	Th-230/U-238
RT	isotope ratios
	Th-230
	U-238
SN	This term has multiple hierarchies.

U-238/Th-232
BT	isotopes
	.radioactive isotopes
	..U-238/Th-232
BT	metals
	.actinides
	..thorium
	...U-238/Th-232
BT	metals
	.actinides
	..uranium
	...U-238/Th-232
UF	Th-232/U-238
RT	Th-232
	U-238
SN	This term has multiple hierarchies.

U-238/U-234
BT	isotopes
	.radioactive isotopes
	..U-238/U-234
BT	metals
	.actinides
	..uranium
	...U-238/U-234
UF	U-234/U-238
RT	isotope ratios
	U-234
	U-238
SN	This term has multiple hierarchies.

U-238/U-235
BT	isotopes
	.radioactive isotopes
	..U-238/U-235
BT	metals
	.actinides
	..uranium
	...U-238/U-235
UF	U-235/U-238
RT	isotope ratios
	U-235
	U-238
SN	This term has multiple hierarchies.